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摘要

A 4-month-old 100-kg (220-lb) Quarter Horse-Thoroughbred cross was evaluated for acute clinical signs of severe abdominal pain, which were characterized by the horse rolling severely on the ground. The horse had been treated 1 month earlier with ivermectin paste. Physical examination findings included a heart rate of 54 beats/min, respiration rate of 40 breaths/min, dark pink oral mucous membranes, and a capillary refill time of 3 seconds. Borborgymi were not detected during auscultation of the abdomen. The horse's abdomen was markedly distended; nasogastric intubation was performed, and 4 L of gastric contents were removed. Ultrasonography of the abdomen was performed (Figure 1).